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Executor (rocket Engine)
Executor is a rocket engine developed by ARCA for use on its Haas rocket series and on IAR 111 Excelsior supersonic airplane. Executor uses kerosenehttp://spacefellowship.com/news/art29703/arca-has-completed-the-first-executor-rocket-engine.html and liquid oxygen as propellants in a gas-generator power cycle. The injector of Executor is of the pintle type that was first used in the Apollo Program for the lunar module landing engine. Propellants are fed via a single shaft, dual inducer-impeller turbo-pump. The turbine exhaust gases are used for attitude control of the Haas 2 rocket. Variants Two versions of the Executor are in development. The Executor engine for the first stage of the Haas 2B and Super Haas launchers and for the IAR-111 Excelsior airplane. The second variant is the Executor Plus engine that it uses a larger exhaust nozzle optimized for vacuum operation. The Executor Plus is used on the Haas 2 air-launched rocket and on the second stage of the Super Haas rocke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARCA (NGO)
Romanian Cosmonautics and Aeronautics Association ( ro, Asociația Română pentru Cosmonautică și Aeronautică), also known as ARCAspace, is an aerospace company based in Râmnicu Vâlcea, Romania. It builds rockets, high-altitude balloons, and unmanned aerial vehicles. It was founded in 1999 as a non-governmental organization in Romania by the Romanian engineer and entrepreneur Dumitru Popescu and other rocket and aeronautics enthusiasts. Since then, ARCA has launched two stratospheric rockets, four large scale stratospheric balloons including a cluster balloon and was awarded two governmental contracts with the Romanian government and one contract with the European Space Agency. ARCASpace is currently developing a three-stage, semi-reusable steam-powered rocket called EcoRocket and in 2022 has shifted its business model to Asteroid mining. History 1999–2004: Demonstrator rocket family ARCA was established as ''Romanian Cosmonautics and Aeronautics Association'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ablation
Ablation ( la, ablatio – removal) is removal or destruction of something from an object by vaporization, chipping, erosive processes or by other means. Examples of ablative materials are described below, and include spacecraft material for ascent and atmospheric reentry, ice and snow in glaciology, biological tissues in medicine and passive fire protection materials. Artificial intelligence In artificial intelligence (AI), especially machine learning, ablation is the removal of a component of an AI system. The term is by analogy with biology: removal of components of an organism. Biology Biological ablation is the removal of a biological structure or functionality. Genetic ablation is another term for gene silencing, in which gene expression is abolished through the alteration or deletion of genetic sequence information. In cell ablation, individual cells in a population or culture are destroyed or removed. Both can be used as experimental tools, as in loss-of-function ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket Engines Using Kerosene Propellant
A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. Signi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fastrac (engine)
Fastrac was a turbo pump-fed, liquid rocket engine. The engine was designed by NASA as part of the low cost X-34 Reusable Launch Vehicle (RLV) and as part of the Low Cost Booster Technology (LCBT, aka Bantam) project. This engine was later known as the MC-1 engine when it was merged into the X-34 project. Design The turbopump engine was designed to be used in an expendable booster in the LCBT project. As a result this led to the use of composite materials because of their significantly lower costs and production speed; this also reduced engine complexity since the fuel was not used for nozzle cooling. Based on knowledge and experience from the Space Shuttle's Reusable Solid Rocket Motor (RSRM) and the Solid Propulsion Integrity Program (SPIP), a Silica/phenolic material was chosen for the ablative liner with carbon/epoxy structural overlap. The engine fuel was a mixture of liquid oxygen and kerosene (RP-1). These propellants are used by Saturn F1 rocket engine. Kerosene does ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merlin (rocket Engine)
Merlin is a family of rocket engines developed by SpaceX for use on its Falcon 1, Falcon 9 and Falcon Heavy launch vehicles. Merlin engines use RP-1 and liquid oxygen as rocket propellants in a gas-generator power cycle. The Merlin engine was originally designed for sea recovery and reuse, but since 2016 the entire Falcon 9 booster is recovered for reuse by landing vertically on a landing pad using one of its nine Merlin engines. The injector at the heart of Merlin is of the pintle type that was first used in the Apollo Lunar Module landing engine ( LMDE). Propellants are fed by a single-shaft, dual-impeller turbopump. The turbopump also provides high-pressure fluid for the hydraulic actuators, which then recycles into the low-pressure inlet. This eliminates the need for a separate hydraulic drive system and means that thrust vectoring control failure by running out of hydraulic fluid is not possible. Revisions Merlin 1A The initial version, the Merlin 1A, used an in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
România TV
România TV is a 24-hour Romanian news television with conservative and nationalist orientation, launched on 23 October 2011 by former entrepreneur and politician Sebastian Ghiță. Its slogan is "We give the exact news!" ( ro, Noi dăm știrea exactă!). Initially known as RTV, it was formed when the then-new owner of Realitatea TV Realitatea TV (, meaning "The Reality TV") is the former name of the Romanian news television channel Realitatea Plus. The channel began broadcasting in 2001 as a general-profile television and became the first Romanian news television in 2002. ..., Elan Schwartzenberg, moved the headquarters of the television at Willbrook Platinum. The channel has the former headquarters and some employees of Realitatea TV. On 1 December 2011, RTV changed its name to România TV, following disputes between Ridzone Computers (the channel's operator) and Realitatea Media SA (to which the RTV brand belongs). Later, on 24 August 2013, the channel changed its logo, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Google Lunar X Prize
The Google Lunar XPRIZE (GLXP), sometimes referred to as Moon 2.0, was a 2007–2018 inducement prize space competition organized by the X Prize Foundation, and sponsored by Google. The challenge called for privately funded teams to be the first to land a lunar rover on the Moon, travel 500 meters, and transmit back to Earth high-definition video and images. The original deadline was the end of 2014, with enhanced prize money for a landing by 2012. In 2015, XPRIZE announced that the competition deadline would be extended to December 2017 if at least one team could secure a verified launch contract by 31 December 2015. Two teams secured such a launch contract, and the deadline was extended. In August 2017, the deadline was extended again, to 31 March 2018. Entering 2018, five teams remained in the competition: SpaceIL, Moon Express, Synergy Moon, Team Indus, and Team Hakuto, having secured verified launch contracts with Spaceflight Industries, Rocket Lab, Interorbit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video sharing and social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's AdSense program, which seeks to generate more revenue for both parties. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Fiber
Carbon fiber-reinforced polymers (American English), carbon-fibre-reinforced polymers (Commonwealth English), carbon-fiber-reinforced plastics, carbon-fiber reinforced-thermoplastic (CFRP, CRP, CFRTP), also known as carbon fiber, carbon composite, or just carbon, are extremely strong and light fiber-reinforced plastics that contain carbon fibers. CFRPs can be expensive to produce, but are commonly used wherever high strength-to-weight ratio and stiffness (rigidity) are required, such as aerospace, superstructures of ships, automotive, civil engineering, sports equipment, and an increasing number of consumer and technical applications. The binding polymer is often a thermoset resin such as epoxy, but other thermoset or thermoplastic polymers, such as polyester, vinyl ester, or nylon, are sometimes used. The properties of the final CFRP product can be affected by the type of additives introduced to the binding matrix (resin). The most common additive is silica, but other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbo-pump
A turbopump is a propellant pump with two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together. They were initially developed in Germany in the early 1940s. The purpose of a turbopump is to produce a high-pressure fluid for feeding a combustion chamber or other use. There are two types of turbopumps: a centrifugal pump, where the pumping is done by throwing fluid outward at high speed, or an axial-flow pump, where alternating rotating and static blades progressively raise the pressure of a fluid. Axial-flow pumps have small diameters but give relatively modest pressure increases. Although multiple compression stages are needed, axial flow pumps work well with low-density fluids. Centrifugal pumps are far more powerful for high-density fluids but require large diameters for low-density fluids. History Early development High-pressure pumps for larger missiles had been discussed by rocket pioneers s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romania
Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and the Black Sea to the southeast. It has a predominantly temperate- continental climate, and an area of , with a population of around 19 million. Romania is the twelfth-largest country in Europe and the sixth-most populous member state of the European Union. Its capital and largest city is Bucharest, followed by Iași, Cluj-Napoca, Timișoara, Constanța, Craiova, Brașov, and Galați. The Danube, Europe's second-longest river, rises in Germany's Black Forest and flows in a southeasterly direction for , before emptying into Romania's Danube Delta. The Carpathian Mountains, which cross Romania from the north to the southwest, include Moldoveanu Peak, at an altitude of . Settlement in what is now Romania began in the Lower Pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pintle Injector
The pintle injector is a type of propellant injector for a bipropellant rocket engine. Like any other injector, its purpose is to ensure appropriate flow rate and intermixing of the propellants as they are forcibly injected under high pressure into the combustion chamber, so that an efficient and controlled combustion process can happen. A pintle-based rocket engine can have a greater throttling range than one based on regular injectors, and will very rarely present acoustic combustion instabilities, because a pintle injector tends to create a self-stabilizing flow pattern. Therefore, pintle-based engines are specially suitable for applications that require deep, fast, and safe throttling, such as landers. Pintle injectors began as early laboratory experimental apparatuses, used by Caltech's Jet Propulsion Laboratory in the mid-1950s, to study the mixing and combustion reaction times of hypergolic liquid propellants. The pintle injector was reduced to practice and developed by S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
